#!/bin/sh

# This script extracts and compares the commands defined in the manual
# to those defined in the source code.

grep '^DEF_CMD' $1/../kernel/cmd.def \
    | sed -e 's/\\\\/\\/' \
    | sed -e 's:^[^(]*(\([^,]*\), "\([^"]*\)".*$:\1 \2:' \
    | sed -e "s/C('\(.\)')/C-\1/" -e "s/ *'\(.\)' /\1/" -e 's/   0  /0/' \
    | sed -e "s/^  /' ' /" \
    | grep -v '0 D' \
    | sort | uniq >src.cmds

# Join all @item lines with their following lines.

cat  $1/../doc/commands.texi \
    | sed -e 's/^@item \(.*\)$/@item \1 EOL/' \
    | sed -e '/^@item /{N;s/EOL.//;P;D;}' \
    >joined.txt

# Single-letter commands.

cat joined.txt \
    | grep -h "^@item [^'] "  \
    | sed -e 's/^@item \(.\) (@code{\([^}]*\)}).*$/\1 \2/' \
    >doc.cmds1

# Escaped single-letter commands.

cat joined.txt \
    | grep -h "^@item @. "  \
    | sed -e 's/^@item @\(.\) (@code{\([^}]*\)}).*$/\1 \2/' \
    >doc.cmds2

# Quoted single-letter commands.

cat joined.txt \
    | grep -h "^@item '.' "  \
    | sed -e "s/^@item '\(.\)' (@code{\([^}]*\)}).*$/'\1' \2/" \
    >doc.cmds3

# Control-character commands.

cat joined.txt \
    | grep -h "^@item ^. "  \
    | sed -e 's/^@item ^\(.\) (@code{\([^}]*\)}).*$/C-\1 \2/' \
    >doc.cmds4

# Long-name-only commands.

cat joined.txt \
    | grep -h "^@item [a-zA-Z][a-zA-Z-][a-zA-Z-]* "  \
    | sed -e 's/@@/@/' \
    | sed -e 's/^@item \([a-zA-Z-]*\) .*$/0 \1/' \
    > doc.cmds5

cat doc.cmds[1-5] | grep -v '0 D' | sort | uniq >doc.cmds

echo "Differences between commands in reference manual and in source code:"
echo "('<' - in documentation,  '>' - in sources)"

diff -w doc.cmds src.cmds

exit 0